WO2011040836A1 - Procédé de fabrication de bandes laminées à chaud dans une machine de coulée continue et laminoir à bande large - Google Patents

Procédé de fabrication de bandes laminées à chaud dans une machine de coulée continue et laminoir à bande large Download PDF

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Publication number
WO2011040836A1
WO2011040836A1 PCT/RU2010/000540 RU2010000540W WO2011040836A1 WO 2011040836 A1 WO2011040836 A1 WO 2011040836A1 RU 2010000540 W RU2010000540 W RU 2010000540W WO 2011040836 A1 WO2011040836 A1 WO 2011040836A1
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WO
WIPO (PCT)
Prior art keywords
slabs
roughing
heating
thickness
stand
Prior art date
Application number
PCT/RU2010/000540
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English (en)
Russian (ru)
Inventor
Виктор Николаевич ХЛОПОНИН
Original Assignee
Hloponin Viktor Nikolaevich
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hloponin Viktor Nikolaevich filed Critical Hloponin Viktor Nikolaevich
Publication of WO2011040836A1 publication Critical patent/WO2011040836A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting

Definitions

  • the invention relates to the production of hot rolled strips from continuously cast slabs in the iron and steel industry on broadband mills (ShPS etc.).
  • the marked figures determine the relevance of technical developments aimed at reducing energy consumption in the process of wide-band hot rolling.
  • heating or heating of slabs to a predetermined temperature of the onset of rolling is carried out in methodical heating furnaces, in which, as already noted, energy consumption is reduced to fuel consumption.
  • the significant disadvantages of this method include: - firstly, the impossibility of its implementation at most operating metallurgical complexes of continuous casting machines - ShPS, etc., when the implementation of the method is difficult due to the location of other workshops on the general plan of the metallurgical plant;
  • a known method for the production of hot-rolled strips in the metallurgical complex CCM - SHPS cp including casting steel into slabs and transportation of hot slabs at cps cp, heating slabs in methodological furnaces (the so-called hot landing), rolling hot slabs at ShPS with the production of hot rolled strips (see, for example, in the same place, the second option in Fig. 6 of the CCM – SHPS complex operation, etc.).
  • the higher the temperature of the slabs loaded into the methodical furnaces for heating the higher the fuel economy for heating the slabs.
  • a known method for the production of hot rolled strips in the metallurgical complex CCM - broadband mill which includes casting steel into slabs, transporting slabs to the mill, heating or heating slabs in methodical furnaces with walking beams, rolling hot slabs in the beginning in the rough group of stands, then in the finishing group stand and winding the finished strips into a roll (see, for example, “technological instruction TI 05757665 - LPC - 3 - 01 - 2003” of OJSC “NLMK”).
  • a broadband mill which includes casting steel into slabs, transporting slabs to the mill, heating or heating slabs in walking furnace furnaces, deformation of hot slabs at the beginning in the roughing group of the stands or in the reversing roughing then in the finishing group of the stands and winding the finished strips according to the invention, slabs of the same length are obtained during casting on continuous casting machines but of different thicknesses, and in the process of deformation of slabs in the roughing stand group or in the reverse roughing stand, as the thickness of the slabs fed to the rolling decreases, the compressions in the rough passages decrease until the first roughing stands are completely removed from the slab deformation or the number passages in a reversible roughing stand, the length of the cast slabs being equal to the maximum length of the slabs for rolling which is designed for wide moose camp, and the thickness of the slabs with the same width is determined by the mass of rolls obtained from them
  • FIG. fifteen A method for the production of hot rolled strips at the CCM metallurgical complex - broadband mill is illustrated by the drawings in FIG. fifteen.
  • FIG. 1 shows the metallurgical complex CCM - ShPS etc .
  • FIG. 2 the ratio of the parameters of slabs cast on the continuous casting machine (usually of the same width) and their location in the methodical heating furnace with walking beams when implementing the known method
  • FIG. 3 the ratio of the parameters of the slabs cast on the continuous casting machine (conventionally of the same width) and their location in the methodical heating furnace with walking beams during the implementation of the proposed method
  • FIG. 4 specific parameters of slabs cast on a continuous casting machine and their location in a methodical heating furnace in the known method and in FIG. 5 is the same as in the example of FIG. 4 when implementing the proposed method.
  • Metallurgical complex CCM - ShPS contains a steel ladle 1 (Fig. 1), an intermediate ladle 2, a slab crystallizer 3, a section for secondary cooling of slabs 4, rolling equipment 5 (strictly speaking, not mandatory), a section for cutting slabs across 6, transport 7 slab feeding path from the continuous casting machine to the ShPS of the settlement, where the slabs are heated or heated in methodological furnaces with walking beams of 8 ShPS of the settlement, hot slabs are rolled at the beginning in the roughing group of stands 9, then in the finishing group of stands 10 and wound finished hot rolled strips on coilers 11.
  • Section 4 is equipped with a well-known method by itself (see, for example, G.
  • the transport routes 7, up to the planting of slabs in the furnace 8, can be equipped with devices for reducing the cooling of slabs in the section from item 6 to item 8 in FIG. 1.
  • the roughing group of stands 9 may contain several stands Rj through which the reel passes sequentially (continuous ShPS of the item, including the formation of a continuous subgroup of the last two or three stands).
  • the roughing group of stands 9 can consist of one reversing stand (semi-continuous SHPS of the item) or contain one of the reverse stands of reversing (3/4 continuous mill used when the mass of rolled slabs exceeds 15 tons).
  • SHPS gp In the process of transferring the reel from draft 9 to the finishing group of 10 stands, heat-saving installations are used (screens on continuous and 3/4 continuous ShPS of the city; coil coil - on semi-continuous ShPS of the city).
  • the finishing group of stands 10 contains from 6 to 7 four-roll stands, while a continuous rolling process is realized in the finishing group.
  • the number of winders 1 1 depends on the productivity of the mill and ranges from two to three winders.
  • methodical heating furnaces 8 with walking beams are used, since the thickness of the slabs varies widely, which eliminates the possibility of methodical furnaces of the push type.
  • 12 walls of the furnace
  • 13 and 14 fixed and movable beams of the furnace, respectively
  • 15 arrangement of slabs in the furnace.
  • the proposed method for the production of hot rolled strips is carried out as follows.
  • Liquid steel from the steel pouring ladle 1 enters the intermediate ladle 2, from which it is fed to the mold 3, where the steel crystallizes into a slab with a thickness of stoch, and enters the secondary cooling zone 4.
  • the secondary cooling zone or keep the thickness slab unchanged (i.e., H cm yak, see. the dotted line in FIG. 1) or a decrease in a known manner not to reflux, including with the use of rolling equipment 5 (the latter, strictly speaking, depending on the intended changes of slab thickness from 7 stakh to stt rolling equipment 5 can is absent in the metallurgical complex CCM - SHPS etc., in which the proposed method is implemented).
  • the crystallization of the slab is terminated over its entire cross section.
  • the slabs are cut into measured lengths, and the length of the cut slabs, regardless of their other parameters, is the same and equal to the maximum length of the slabs L Cm ax rolled on the SHPS, p. (heated in the methodical furnaces of the mill).
  • the thickness of the slabs N s obtained from the continuous casting machine is changed from N t max. to cmin, i.e.
  • H c Varia
  • B c Const (conditionally consider one width)
  • y const is the density of steel
  • G P Varia - mass of a roll produced from a slab of the corresponding thickness N s .
  • the mass of the rolled slab G P includes the loss of metal with scale and with cutting on flying shears.
  • FIG. 2 shows the applicable stacking of slabs in a methodical furnace according to a known method for the production of slabs.
  • FIG. 2 illustrates the method of laying in a methodical furnace slabs of the same thickness (He - Const), but of different lengths L - Varia according to the known method. It is clearly seen that in the known method for the production of hot rolled strips at the metallurgical complex CCM - ShPS eliminated the possibility of uniform use of the working space of the methodical furnace.
  • the essence of the change is as follows. As the thickness of the hot slabs fed to the rolling decreases, the reduction in the first passes of the roughing group 9 is reduced. hot slabs are excluded on continuous and 3/4 continuous ShPS metal deformation in the first roughing stands, on semi-continuous ShPS reduce the number of passes in the rough reversing stand.
  • the maximum length of the slabs is limited by the working space of the method furnace L n .
  • slabs 15 are laid as shown in FIG. four.
  • FIG. 5 shows the values of n [according to formula (2)] of the reduction in the duration of heating of slabs of different thicknesses in a methodical furnace compared with the heating of slabs according to FIG. 4 with the same for FIG. 4 and 5, the conditions for the slabs to enter the furnace and the temperatures for unloading slabs from the furnace.
  • the implementation of the proposed method for the production of hot-rolled strips at the metallurgical complex CCM - ShPS allows for the same program for the production of hot rolled strips to reduce the duration of heating or heating slabs in methodological furnaces by an average of 1.96 times, and in the production of rolls of the smallest mass - by 3 times.
  • n refers to the time of heating the slabs from the temperature of their insertion into the methodical furnace to the required temperature for rolling the slabs at the ShPS, p.
  • the considered metallurgical complex CCM - ShPS contains a continuous broadband mill 2000 with a vertical descaler (V.O.) and five universal roughing stands R ⁇ - R 5 .
  • the finishing group contains seven quarto stands F ⁇ - F 7 ; flying scissors are installed in front of the finishing stands; the live roll between stands R and F ⁇ (intermediate) contains a heat-preserving unit (screens).
  • the mill contains three coilers.
  • Roughing mill stands Rj with a strip width of up to 1450 mm allow relative reductions: Ri - 25%, R 2 - 35%, R 3 - 45%, R 4 - 46% and R 5 - 45%.
  • hot-rolled strips are rolled with a width of 1250 mm and a thickness of 3 mm from steel ZSP.
  • reductions are carried out: in Ri - 24% (at the exit from the stand 182 mm), in R 2 - 34% (120 mm), in R 3 - 33% (80 mm), in R 4 - 30% (56 mm) and in R 5 - 37.5% (35 mm).
  • a roll (tack) of thickness 35 mm is obtained, which is transferred to finishing stands F, and hot-rolled strips 3.0 mm thick are rolled up into bosoms on winders.
  • V.O. V.O.
  • the hydraulic breaker working with it to remove furnace scale.
  • the cooling of the rolls and the operation of descaling are switched off, which reduces the cooling of the slab.
  • the continuous casting machine is a semi-continuous ShPS of the city of continuously cast slabs of all thicknesses and lengths shown in FIG. 5, which are heated or preheated in walking beam process furnaces.
  • ShPS semi-continuous ShPS of the city of continuously cast slabs of all thicknesses and lengths shown in FIG. 5, which are heated or preheated in walking beam process furnaces.
  • example 1 when slabs are heated in methodical furnaces, a significant reduction in fuel consumption in methodological furnaces is obtained by reducing the heating time of thinner slabs.
  • the compression mode is assigned in the first pass to a thickness of 182 mm, in the second pass up to 120 mm, in the third pass up to 80 mm, in the fourth pass up to 56 mm and in the fifth pass up to 35 mm
  • the reduction in the first pass is reduced.
  • part of the compression of the thickness of the slabs is transferred from the second pass to the first pass.
  • three passes are realized in a black reversing stand.
  • the reduction of slabs in the third pass is reduced.
  • part of the reductions from the penultimate pass are transferred to the third pass.
  • 80 mm thick slabs are rolled in three passes in a roughing stand.
  • the implementation of the method allows one to significantly reduce fuel consumption for heating slabs, reduce energy losses due to deformation of the metal, increase the operational parameters of methodical furnaces, increase the operability of the first roughing stands and reduce metal loss with cutting on flying shears.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)

Abstract

Selon l’invention, on propose lors du coulage dans une machine de coulée continue de produire des plaques de longueur identique mais d’épaisseurs différentes et, lors de la déformation de ces plaques dans un groupe de dégrossisseurs ou un dégrossisseur inverse, à mesure que l’épaisseur des plaques destinées au laminage se voit réduire, réduire le serrage lors des passages par les dégrossisseurs jusqu’à l’élimination totale des déformations des premiers dégrossisseurs ou la diminution du nombre de passage par le dégrossisseur inverse; la longueur des plaques de coulée est égale à la longueur maximale des plaques possible dans le laminoir à bande large, et l’épaisseur des plaques de largeur identique est déterminée par la masse des rouleaux obtenus.
PCT/RU2010/000540 2009-10-02 2010-09-29 Procédé de fabrication de bandes laminées à chaud dans une machine de coulée continue et laminoir à bande large WO2011040836A1 (fr)

Applications Claiming Priority (2)

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RU2009136406 2009-10-02
RU2009136406/02A RU2415724C1 (ru) 2009-10-02 2009-10-02 Способ производства горячекатаных полос на металлургическом комплексе мнлз - широкополосовой стан

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WO2011040836A1 true WO2011040836A1 (fr) 2011-04-07

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113111452A (zh) * 2021-03-22 2021-07-13 北京科技大学 一种面向热轧带钢的极限规格轧制建议的分析方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112570450B (zh) * 2019-09-30 2022-03-01 宝钢湛江钢铁有限公司 一种厚板轧线及其生产方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0584605A1 (fr) * 1992-08-26 1994-03-02 DANIELI & C. OFFICINE MECCANICHE S.p.A. Dispositif et procédé pour la fabrication d'une bande métallique laminée à chaud
RU2254182C2 (ru) * 2002-03-06 2005-06-20 Закрытое акционерное общество "Ново-Краматорский машиностроительный завод" Способ горячей прокатки тонкой полосы и мини-стан для его осуществления
RU2301120C2 (ru) * 2001-11-03 2007-06-20 Смс Демаг Акциенгезелльшафт Способ и литейно-прокатная установка для изготовления стальной полосы
US7363792B2 (en) * 2004-12-18 2008-04-29 Sms Demag Ag Apparatus for manufacturing metal material by rolling

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0584605A1 (fr) * 1992-08-26 1994-03-02 DANIELI & C. OFFICINE MECCANICHE S.p.A. Dispositif et procédé pour la fabrication d'une bande métallique laminée à chaud
RU2301120C2 (ru) * 2001-11-03 2007-06-20 Смс Демаг Акциенгезелльшафт Способ и литейно-прокатная установка для изготовления стальной полосы
RU2254182C2 (ru) * 2002-03-06 2005-06-20 Закрытое акционерное общество "Ново-Краматорский машиностроительный завод" Способ горячей прокатки тонкой полосы и мини-стан для его осуществления
US7363792B2 (en) * 2004-12-18 2008-04-29 Sms Demag Ag Apparatus for manufacturing metal material by rolling

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113111452A (zh) * 2021-03-22 2021-07-13 北京科技大学 一种面向热轧带钢的极限规格轧制建议的分析方法
CN113111452B (zh) * 2021-03-22 2023-08-11 北京科技大学 一种面向热轧带钢的极限规格轧制建议的分析方法

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